Sewing-machine



2 Sheets-Sheet 1.

odel.)

J BI

SEWING MAGHINB.

Patented Feb. 14,18 82.

(No Model.) 2 Sheets-Sheet 2.

- J. B. SEGOR.

SEWING MACHINE.

Patented Feb. 14,1882.-

N. PETERS. Pholo-Lillwgnphur, Walhinglon. D. c.

UNITED STATES PATENT CFFICE.

JEROME B. SECOR, OF BRIDGEPORT, CONNECTICUT.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 253,773, dated February 14, 1882.

Application filed September [7, 1881.

. inafter, in the construction of the shuttle, needle, and feed-operating appliances.

In the drawings, Figure 1 is a perspective view, showing a sewing-machine with my improvements. Fig. 2 is a section of part of the overhanging arm, showing the connection of the needle-bar and driving-rod. Fig. 3 is apart section on the line 1 2, Fig. 2. Fig. 4 isan inverted plan. Fig. 5 is a part section on the line 3 4, Fig. 4. Fig. (Sis a part section on the line 5 6, Fig. 4. Fig. 7 is a part section on the line 7 8, Fig. 4. Fig. 8 is an end view of the.

shuttle-lever. Fig. 9 is a section on the line 9 10, Fig. 4; Figs. 10,11, and 12, views illustrating the connection of the, needle-lever and needle-bar.

A is the bed-plate; B,the overhanging arm; C, the driving-shaft projecting through the pillow-block D. G is the shuttle-lever; G, the shuttle. G is the needle-operating lever, vibrating on a fulcrum, m,- G*, the needle-bar; and H is the feed-lever.

The driving-shaft C carries a cam, E, and disk S, connected by a crank-pin, R, with a spherical surface adapted to form a ball-andsocket crank connected with an arm, V, which extends upward into the arm B,andis pivoted at the upper end to a pin, 2, at the side of a disk, W, turning on pins ca, theformer extending through the side of the arm B and the latter through a detachable plate, B, covering an opening in the arm, through which access may be had to the adjacent parts.

The diskW is slotted, and a pin, 3 extends across the opening through a slot, b, at the end of the needle-bar-operating lever G The connection between the needle-leverand needle-bar is made by a pin, 4, on the needle- (No model bar, carrying a sphere, 5, fitting a socket in the needle-bar lever, as shown in Figs. 10 to 12. This construction secures a direct connection between the needle bar and lever, and permits the play of the latter without lost motion, the needle-bar turning slightly as the levervibrates. As the driving-shaft C is turned the rod V is reciprocated, rocking the crank-disk W, vibrating the lever G and thus reciprocating the needle-bar.

The shuttle-lever Gr vibrates on a vertical pivot, d, and receives its motion from a spherical-headed crank-pin, e, on the disk S. The

head of said pin fits between the two parts t 7 i of a box sliding in a vertical slot, f, at the rear end of the lever G. A nice fit is secured and lost motion prevented and wear compensated for by making one side of the slot f inclined, and fitting theretoawedge, g, as shown in Fig. 8, the adjustment of the wedge by means of a screw, 13, passing through aslotin thelever into the wedge, varying the width of the slot.

h, extending through a slot in the plate, and the other end is socketed to receive the end of the feed-lever H, which has a transverse slot, through which passes a pin, it, Figs. 1 and 4, the said pin being vertically adjustablein a slotted stud, N, at thebottom of the base-plate. The rear end of the lever H is spherical and adapted to a socket in a lever, F,withasquare opening, in which plays the cam E, and with a slot at the other end, through which passes a stationary pin, j, Figs. 1 and 5.

To an adjustable plate, P, sliding between guides m m at the under side of the base-plate, Figs. 1, 4, and 9, is pivoted by apin,n,a stud, O, with a slot for the free passage ofthelevcr H, which may thus slide through the stud, while thelatter serves asavertical pivotorfulcrumibr the lever, determining the extent of the longitudinal movement of the feed-plate, while the pin it constitutes a horizontal fulcrum, on which the lever vibrates vertically, determining the vertical movement of the feed-plate. Both the vertical and horizontal vibrations of the leverH are derived from the leverF,-which is thrown up and down and back and forth by The feed-plate M slides at one end on a pin,

the cam E, and as the latter has an edge, t, which coincides with the periphery of a circle whose center is the axis of the cam, there will be a dwell after each movement, so as toinsure four distinct motions of the feed-plate.

By the use of ball-and-socket connections between the different connected parts,as shown, I reduce the expense and liability to wear, and avoid the lost motion resulting when links, or slots and pins are employed.

It will be seen that the crank-shaftCand the shuttle-lever G, which is driven from said shaft, are on the same horizontal plane. By this arrangement the thrust is reduced and a shorter crank required and a more even motion secured than would be the case if the parts were otherwise relatively arranged and connected, a different arran gementrendering more complicated connections necessary.

I claim- 1. The combination of the shaft 0, sphericalended crank-pin c, shuttle-lever G, arranged on the same horizontal plane as the shaft, having a vertical slot at the rear end, and a box adapted to receive the head of the crank-pin c and sliding in the slot of the lever, substantially as set forth.

2. The combination of the driving-shaft, its

with the crank It, the feed device connected with the cam E, and the shuttle-lever connected with the crank-pin a, substantially as setforth.

4. The combination of thefeed-plate M, sliding at one end on a pin, it, a lever, H, connected to the opposite end of said feed-plate, an adjustable horizontal fulcrum-pin, 70, extending through a slot in the lever, a verticallypivotcd adjustable fulcrum-block, O, slot-ted for the passage of the lever, and appliances for vibrating the rear end of the lever vertically and horizontally, substantially as set forth.

In testimony whereof Ihave signed my name to this specification in the presence of two subscribing witnesses.

JEROME B. SEOOR.

Witnesses:

H. F. Noacaoss, H. O. LUND. 

